There are ways to get a FOI request to the army, navy and marines to check their records base on the model and serial number. I have done this on a few of my guns. I have a ton more I should check on. The records are incomplete and mostly date from the 1970s, due to a records storage fire. If you google search, you can find online discussions with the website and emails to make the requests.
If will usually show where they were issued to..location and sometimes unit. I recall one of my 1911s was in CA, then Japan, then to the east coast, and ended up back in storage in AL, then transferred to the CMP.